general: Code formatting improvements

Slight improvements to readability.

Dropped suggestions for string_view (settings.h:101), pass by value
(settings.h:82), reverting double to a float (config.cpp:316), and other
smaller ones, some out of scope.

Addresses review feedback.

Co-authored-by: Ameer J <52414509+ameerj@users.noreply.github.com>